#include"mystdio.h"
#include<unistd.h>

int main()
{
  _FILE*file = _fopen("file.txt","a");
  if(file==NULL) return -1;
const char*message="hello linux\n";
int cnt=6;
while(cnt--)
{
  
_fwrite(file,message,strlen(message));
}


_fclose(file);

  return 0;
}
